drop table corp CASCADE CONSTRAINTS;
create table corp
(
	c_id number,
	c_name varchar2(40) UNIQUE,
	c_regnum varchar2(11),
	c_phone varchar2(12),
	c_address varchar2(1000),
	c_ceo varchar2(20),
	constraint corp_pk primary key (c_id)
);

drop sequence corp_seq;
create sequence corp_seq
start with 1
increment by 1;

insert into corp values(corp_seq.nextval, '다우기술', '1112233333', '07087071000','경기도','김영훈');
insert into corp values(corp_seq.nextval, '키움증권', '1123446333', '07087071000','경기도','박양석');
insert into corp values(corp_seq.nextval, '이머니', '1754564333', '07087071000','경기도','김이재');
insert into corp values(corp_seq.nextval, '다우데이타', '1753345312', '07087071000','경기도','최익선');